What? maybe a million people are using it...? ehh wut?Where do you get these numbers, the statistics sites show about 100k active nodes daily, i assume most are the same each time... And i highly doubt there's 900k people using ewallets or whatever...

Have used it not are using it. It's really hard to estimate, the numbers are all over the place.There's a lot of people that have downloaded the client or sent 1 btc then never used it again and they've still tried it. If there is 100k active a day (didn't think it's that high at the moment) then there are a lot more than 100k that have tried it.

I liked that interview, bummer the camera was tilted and you can't see Charlie for half of it.

That number alone doesn't say much but its change over time will help to indicate the level of growth occurring.

That number has been increasing at about 3% per month. If the user population growth is at the same level that's about a 40% annual growth rate.

It's not inconceivable to think that in the year or so that Bitcoin started to be discussed in the tech arena that there have been a million people that signed up, and got a payment from the Faucet, for instance or made a small investment that remains on an exchange, for instance.

The number of transactions on the blockchain show a much smaller active user base though. Fortunately, that too is growing (and at a faster rate even)

When spending the client chooses coins so that the combination resulting in the least amount of change is the result. (Ignoring special case, like coins that haven't confirmed yet). Oftentimes this will "merge" coins whether that was the intention or not.

So an active user will generally not have much growth to the number of addresses over time even though each payment received is to a different address. The ones that save without spending are the ones who will end up with many addresses holding unspent coins.

But you are correct, it is really hard to have any assurance that an estimate based on data like "addresses with unspent coins" is anywhere near accurate.